// Binary diagd provides automated network diagnostics.
package main
import (
"flag"
"fmt"
"html"
"io"
"log"
"net/http"
"sync"
"router7/internal/diag"
)
func dump(w io.Writer, re *diag.EvalResult) {
symbol := "✔"
if re.Error {
symbol = "✘"
}
fmt.Fprintf(w, "%s %s: %s", symbol, html.EscapeString(re.Name), html.EscapeString(re.Status))
for _, ch := range re.Children {
dump(w, ch)
}
fmt.Fprintf(w, "
")
}
func logic() error {
const (
uplink = "uplink0" /* enp0s31f6 */
ip6allrouters = "ff02::2" // no /etc/hosts on gokrazy
)
m := diag.NewMonitor(diag.Link(uplink).
Then(diag.DHCPv4().
Then(diag.Ping4Gateway().
Then(diag.Ping4("google.ch").
Then(diag.TCP4("www.google.ch:80"))))).
Then(diag.DHCPv6().
Then(diag.Ping6("lan0", "google.ch"))).
Then(diag.RouterAdvertisments(uplink).
Then(diag.Ping6Gateway().
Then(diag.Ping6(uplink, "google.ch").
Then(diag.TCP6("www.google.ch:80"))))).
Then(diag.Ping6("", ip6allrouters+"%"+uplink)))
var mu sync.Mutex
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
mu.Lock()
re := m.Evaluate()
mu.Unlock()
fmt.Fprintf(w, ``)
dump(w, re)
})
// TODO: only listen on private IP addresses
return http.ListenAndServe(":7733", nil)
}
func main() {
flag.Parse()
if err := logic(); err != nil {
log.Fatal(err)
}
}